Data/hora: 10/06/2024 14:59:30

Provedor de dados: 	124	
País: 	Brazil	
Título: 	Sediment loss in semiarid small watershed due to the land use	
Autores: 	Rodrigues,Joseilson Oliveira; Andrade,Eunice Maia de; Palácio,Helba Araújo Queiroz; Mendonça,Luiz Alberto Ribeiro; Santos,Júlio César Neves dos.	
Data: 	2013-09-01	
Ano: 	2013	
Palavras-chave: 	Caatinga; Soil degradation; Soil erosion; Ephemeral creek.	
Resumo: 	The aim of this study was to evaluate and compare the sedimentological behavior in two small rural watersheds in the semiarid Northeast of Brazil, examining the influence of human activity on the sediment yields. The studied area is sited in the Alto Jaguaribe basin, more precisely in the Iguatu County, Ceará State. The experimental area was composed of two small watersheds denominated B1 and B2. In watershed B1 a treatment (thinning) was applied, eliminating the plant species with diameters lower than 10 cm. The results showed that the Caatinga clearing practice did have an influence in changing the sediment yield during the first events. It was also found that the magnitude of previous events contributed to an increase in the sediment yields by the subsequent events as a consequence of the sediment deposit in the drainage network. The accumulated sediment yields reached at the end of the 2009 rainfall season values of 1.45 and 1.39 tons ha-1 year-1 for B1 and B2, respectively, with no significant difference at 5%. It was concluded that, even when the effect of treatment on the sediment yields at the beginning of the rainy season is measured, the total sediment yields was not changed by the adoption of clearing. Therefore, it is a management system that can be employed in the land use at semiarid regions.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300010	
Editor: 	Universidade Federal do Ceará	
Relação: 	10.1590/S1806-66902013000300010	
Formato: 	text/html	
Fonte: 	Revista Ciência Agronômica  v.44 n.3 2013	
Fonte: 	info:eu-repo/semantics/openAccess